[PATCH] drm/i915: Allow NULL memory region

[Dan Carpenter]

On Thu, Jul 25, 2024 at 10:58:08AM -0500, Dan Carpenter wrote:
> On Thu, Jul 25, 2024 at 08:48:35AM +0100, Tvrtko Ursulin wrote:
> > 
> > Hi,
> > 
> > On 12/07/2024 22:41, Jonathan Cavitt wrote:
> > > Prevent a NULL pointer access in intel_memory_regions_hw_probe.
> > 
> > For future reference please include some impact assessment in patches tagged
> > as fixes. Makes maintainers job, and even anyone's who tries to backport
> > stuff to stable at some future date, much easier if it is known how
> > important is the fix and in what circumstances can the problem it is fixing
> > trigger.
> > 
> 
> As someone doing backport work, I think this patch is fine.  Everyone
> knows the impact of a NULL dereference in probe().
> 
> I guess with patches that add NULL dereferences, the trick is

s/dereferences/checks/

> understanding when people are adding NULL checks to make a static
> checker happy or when it's a real bug.

regards,
dan carpenter